If语句检查变量的值是否在JSON文件中[关闭]

Question

我是个新手，所以尽量不要评判我。我正在尝试基于旧的 2d 马里奥创建一个小型 2d 游戏。我已经有主窗口、注册和登录窗口，并且我有一个 json 文件来保存用户名和密码。 现在，我正在尝试使用登录功能。 问题似乎是这一行：

if plpaword in players['password']

这应该可以帮助您了解变量代表什么

f = open('player.json')
players = json.load(f)
plpaword = E2.get()

当我运行我的代码时，在我尝试登录之前，其他一切似乎都可以正常工作。登录后，它应该会创建一个新窗口，但发生的情况是什么都没有发生，并且它给出了错误：

Exception in Tkinter callback
Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/tkinter/__init__.py", line 1883, in __call__
    return self.func(*args)
  File "/Users/kevin/PycharmProjects/ANewFile/ANewFile.py", line 101, in LI
    passwords = players['password']
KeyError: 'password'

我使用了这些模块：

from tkinter import *
import tkinter
import tkinter.messagebox
from tkinter import messagebox
from tkinter import Tk, Button, Frame, Entry, END
import random
import json

创建一个帐户并将其保存到我的 player.json 文件中：

    def SU():
        try:
            plusname = E1.get()
            plpaword = E2.get()
            plpaword2 = E3.get()
            plemail = E4.get()
            if plpaword == plpaword2:
                if plusname in players:
                    messagebox.showerror(random.choice(error), "An account with that username already exists. "
                                                               "Please choose another.")
                else:
                    players[plusname] = {'password': plpaword, 'email': plemail}
                    with open('player.json', 'w') as f:
                        json.dump(players, f)
                    signup.destroy()
                    messagebox.showinfo("Account Created!", "Please log in to your new account through log in.")
            else:
                messagebox.showerror(random.choice(error), "Passwords did not match. Please try again")
        except:
            messagebox.showerror(random.choice(error), random.choice(errormsg))

Answer 1

根据SU()的代码，JSON文件里面的内容（也是players的内容）应该是这样的：

{
  "user1": {"password": "pass1", "email": "user1@email.com"},
  "user2": {"password": "pass2", "email": "user2@email.com"}
}

所以检查应该是：

plusname = E1.get()
plpaword = E2.get()
for player in players:
    if plusname == player and plpaword == players[plusname]["password"]:
        print("login successful")
        break
else:
    print("login failed")

即players["password"] 应改为players[plusname]["password"]。